fix(indent): more consistent indents for comments

refer: #3203, #3194

Author: lervag

indent/tex.vim

@@ -51,11 +51,6 @@ function! VimtexIndent(lnum) abort " {{{1
     return empty(l:line) ? indent(l:prev_lnum) : indent(a:lnum)
   endif
 
-  " Use previous indentation for comments
-  if l:line =~# '^\s*%'
-    return indent(l:prev_lnum)
-  endif
-
   " Remove comments before subsequent checks
   let l:line = s:clean_line(l:line)
 

test/test-indentation/test_comments_in_environments_input.tex

@@ -0,0 +1,15 @@
+\documentclass{minimal}
+\begin{document}
+
+  \begin{flushleft}
+    % this comment IS indented like line below
+    Hello world!
+  \end{flushleft}
+
+        \begin{equation}
+                  a = b \\
+                  % comment
+                  c = d
+        \end{equation}
+
+\end{document}

test/test-indentation/test_comments_in_environments_reference.tex

@@ -0,0 +1,15 @@
+\documentclass{minimal}
+\begin{document}
+
+\begin{flushleft}
+  % this comment IS indented like line below
+  Hello world!
+\end{flushleft}
+
+\begin{equation}
+  a = b \\
+  % comment
+  c = d
+\end{equation}
+
+\end{document}

test/test-indentation/test_tikz_reference.tex

@@ -10,16 +10,16 @@
 \begin{tikzpicture}
   \draw [solid] let \p{I} = (0,0) in (1,1) -|
     (\x{I}-1cm,-1cm) node [yshift=-.25cm] {(i)};
-    % Just some comment
+  % Just some comment
 \end{tikzpicture}
 
 \begin{tikzpicture}
-% (i) center contact head
+  % (i) center contact head
   \draw [solid] let \p{I} = (centerContactHead) in (centerContactHead) -|
     (\x{I}-.75cm,-2.5)
     node [yshift=-.25cm] {(i)};
 
-    % (ii) outer conductor of the contact head
+  % (ii) outer conductor of the contact head
   \coordinate (outerContactHead) at (.8,-1.7);
   \draw [solid] let \p{O} = (outerContactHead)
     in (outerContactHead) -- (\x{O},-2.5)